July 2023 1 3 Report
Considera x = –6 y verifica si se cumple la igualdad para este valor en cada ecuación.

20. –3x = 18 6,16
21. 29 + x = 25
22. x + 12 = 6
23. –8x = 24
24. 15 + 2x = 3

25. –5x + 15 = 45
26. 4x + 9 = 19
27. –3x + 5 = 23
28. 7x + 9 = 32
29. 3x – 5 = 50

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